• Selfish Mining - Overwrought Criticism
• Off-chain anonymous transactions by secure transfer of private keys
• Extending the Payment Protocol with vCards
• P2Pool Upgrades
• High-speed Bitcoin Relay Network
• Reduce latency in network processing
• Implementing CoinJoin in main client?
• OSX 10.9 Mavericks AppNapp & Bitcoin-QT Issues
• DoS-ban on blocks that contain invalid proof-of-work
• Raw TX Tool Written in Java
• CoinJoin Blockchain.info implementation now in the wild
• Max H - BitDeliver
• Charles Hope, Dan Patterson - EarlyTemple
As always, if you've got something you'd like to present just shoot me an email and come prepared.